Fix sprite css property
Fix sprite css property

Text-align doesn't have a 'middle' property.

(Vertical-align does though, if that was intended instead..)
jtinianow/jtinianow.github.io,NYUMusEdLab/gulp-starter,samicoman/nodetest,vulkanbureau/gulp-starter,faival/gulpAcademy,clarkras/table_merge,bezreyhan/gem-asset-issuance-demo,cenkce/gulp-starter,bezreyhan/gem-asset-issuance-demo,gregsabo/personal-optimization,voodee/raketa,caltemose/italy-calendar-2016,lucky7id/gulp-starter,gregsabo/personal-optimization,keremciu/gulp-starter,cenkce/gulp-starter,cubbrio/cubbrio.github.io,caltemose/italy-calendar-2016,webmarkelov/gulp-starter,vigetlabs/gulp-starter,AlexeyPopov/gulp-assets-pipeline,greypants/gulp-starter,sunfun/gulp-starter,bezreyhan/front_end_starter,vigetlabs/gulp-starter,caiohdf/railsblocks-theme,clarkras/table_merge,webmarkelov/gulp-starter,greypants/gulp-starter,vigetlabs/gulp-starter,jtinianow/jtinianow.github.io,caltemose/italy-calendar-2016,NYUMusEdLab/gulp-starter,muuran/gulp-starter,jakefleming/mezzotent,vulkanbureau/gulp-starter,voodee/raketa,ennett50/gulp-starter,faival/gulpAcademy,voodee/gulp-starter,samicoman/nodetest,jakefleming/mezzotent,Eforen/gulp-starter,dmitriz/gulp-starter,albertvazquezm/vue-portfolio,cubbrio/cubbrio.github.io,kalled/gulp-starter,lucky7id/gulp-starter,clarkras/table_merge,clarkras/table_merge,Eforen/gulp-starter,clarkras/table_merge,albertvazquezm/vue-portfolio,keremciu/gulp-starter,greypants/gulp-starter,albertvazquezm/vue-portfolio,muuran/gulp-starter,MarceloBorgesP/railsblocks-theme,vulkanbureau/gulp-starter,cubbrio/cubbrio.github.io,uurrnn/urnre,voodee/gulp-starter,uurrnn/urnre,dmitriz/gulp-starter,kalled/gulp-starter,MarceloBorgesP/railsblocks-theme,MarceloBorgesP/railsblocks-theme,tinystride/gulp-starter,dmitriz/gulp-starter,voodee/raketa,samicoman/nodetest,ennett50/gulp-starter,caiohdf/railsblocks-theme,pbest/gulp-starter,voodee/gulp-starter,VKravchuk/gulp-starter,bezreyhan/front_end_starter,tinystride/gulp-starter,voodee/gulp-starter,jakefleming/mezzotent,AlexeyPopov/gulp-assets-pipeline,albertvazquezm/vue-portfolio,SikoraPiotr/gulp-starter,vigetlabs/gulp-starter,voodee/raketa,vulkanbureau/gulp-starter,pbest/gulp-starter,dmitriz/gulp-starter,samicoman/nodetest,sunfun/gulp-starter,caltemose/italy-calendar-2016,SikoraPiotr/gulp-starter,jakefleming/mezzotent,VKravchuk/gulp-starter,cubbrio/cubbrio.github.io,greypants/gulp-starter